Year: 2009
Mileage: 99,224 miles
Symptoms:
- P008700 - Fuel Rail/System Pressure - Too Low
- P030300 - Cyl. 3 Misfire Detected
- P130A00 - Hide Cylinder
- P030000 - Random/Multiple Cylinder Misfire Detected
- Loss of power
- White smoke out of back
- Clicking sound from engine
- Strong smell of fuel
Bonus: If you have a stuck open injector, which it sounds like is often the case, the corresponding spark plug will likely be wet. My injector indeed failed permanently open. If your's fail like this too, then you can actually pull the coilpack and spark plug for that cylinder, check that it's wet, which will confirm that the injector has failed open.
And then if you want, you could open the driver door (which will activate the low-pressure fuel pump) and then see fuel spraying/emptying the fuel rail into the cylinder of the failed injector when the driver door is opened, like below (which should then double-confirm in your mind why changing the oil after such a failure is 100% necessary).
Fix: Replaced all 4 injectors.
(Did all 4 as likely the others will die soon, and it's like ~1% more work to do the other 3 while everything is out of the engine bay.)
Did carbon cleaning while at it.
Cost: Total to replace all 4 injectors:
$276.39
- $49.99 x 4 | Injectors (Bosch from shopdap.com, here)
- $14.49 | Intake Manifold Gasket (elring, which is the best at making gaskets, here)
- $3.99 | Throttle Body Gasket (elring, again, great, here)
- $27.95 | Fuel Injector Installation Kit, Set of Four (Genuine Audi/VW, here)
- $30.00 | Liqui-Moly 2332 5W40 Oil, here (Note that if your injector fails open, you have to change your oil, as the oil will thoroughly be contaminated by gasoline)
Intake Carbon Cleaning total:
$170
- $30 for Harbor Freight Media Blaster
- $120 for Harbor Freight 8 gallon 2.5 HP air compressor [on super-sale]
- $20 for 25lbs of 24 grit Walnut Shell Media.
The intake carbon cleaning is of course optional, and not required to get the car running again like it was prior to injector failure. However, taking the intake manifold off is the majority of the work, so it's relatively easy to clean the intake valves/runners/etc. once it's off.
Here is the technique that I used.
And here's before/after of the intake valves/runners/etc.:
Also, it's worth noting that Audi would have replaced (only) the failed injector under warranty for me, as my car has less than 100k miles and is less than 10 years old (2009 model year, October production). But they wouldn't replace the others, which were in degraded/soon-to-fail state. I'd have to wait for each to fail (which of course would leave me stranded each time) to replace it under warranty. So I just did them all myself, despite them being willing to do 1 for free.
And for anyone in the US who had their injectors replaced by an Audi dealership when their car was w/in the 100k mile and 10 year window, Audi will reimburse you for the cost (see a bit of warranty extension,
here, and also confirmed by my local Audi dealer). You just have to submit the claim with the Audi dealership receipt to Audi of America. The warranty on the injectors was extended because the state of California forced Audi to do so (too many new Audi's were failed emissions in California). Audi's/VW's other choice, which would have been a bit harder on them (but not out of the question, considering the TDI buy-back that happened US-wide) was to buy-back all 2.0T models in California (and then, likely, subsequently US-wide), since they were proving to fail emissions. So they went ahead and extended the warranty on the injectors to avoid having to do that.
Cheers!
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Originally Posted by crash1121
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